<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>TypeScript</title>
  <style>
    #root {
      text-align: center;
      font-size: 28px;
      color: red;
    }
  </style>
</head>

<body>
  <div id="root">hi</div>
</body>
<script>
  var arr = [1, 2, 3, 4];
  var ele = arr.pop();
  console.log("ele", ele);
  console.log("arr", arr);
</script>

</html>